Disney have officially announced the "postponement" of the 3D-erised releases of Episode II and Episode III. Supposedly this was to allow them to have more time to work on Episode VII ... more likely it was due to the lacklustre performance of the 3D-erised version of Episode I.

I wouldn't hold your breath for ever seeing any more of the other Prequel Trilogy movies in 3D, let alone the Original Trilogy.